From e895c98f0ae43853e8150594c8ff1cc03a7663b8 Mon Sep 17 00:00:00 2001 From: sneaxiy Date: Thu, 23 Aug 2018 07:45:17 +0000 Subject: [PATCH] add support to max_len is None --- paddle/fluid/API.spec | 2 +- paddle/fluid/operators/sequence_mask_op.h | 83 ++++++++++++++----- python/paddle/fluid/layers/nn.py | 45 ++++++++-- .../tests/unittests/test_sequence_mask.py | 16 +++- 4 files changed, 112 insertions(+), 34 deletions(-) diff --git a/paddle/fluid/API.spec b/paddle/fluid/API.spec index 359db26ed..01b605352 100644 --- a/paddle/fluid/API.spec +++ b/paddle/fluid/API.spec @@ -162,7 +162,7 @@ paddle.fluid.layers.crop ArgSpec(args=['x', 'shape', 'offsets', 'name'], varargs paddle.fluid.layers.rank_loss ArgSpec(args=['label', 'left', 'right', 'name'], varargs=None, keywords=None, defaults=(None,)) paddle.fluid.layers.prelu ArgSpec(args=['x', 'mode', 'param_attr', 'name'], varargs=None, keywords=None, defaults=(None, None)) paddle.fluid.layers.flatten ArgSpec(args=['x', 'axis', 'name'], varargs=None, keywords=None, defaults=(1, None)) -paddle.fluid.layers.sequence_mask ArgSpec(args=['x', 'max_len', 'mask_dtype'], varargs=None, keywords=None, defaults=('int64',)) +paddle.fluid.layers.sequence_mask ArgSpec(args=['x', 'maxlen', 'dtype', 'name'], varargs=None, keywords=None, defaults=(None, 'int64', None)) paddle.fluid.layers.data ArgSpec(args=['name', 'shape', 'append_batch_size', 'dtype', 'lod_level', 'type', 'stop_gradient'], varargs=None, keywords=None, defaults=(True, 'float32', 0, VarType.LOD_TENSOR, True)) paddle.fluid.layers.open_recordio_file ArgSpec(args=['filename', 'shapes', 'lod_levels', 'dtypes', 'pass_num', 'for_parallel'], varargs=None, keywords=None, defaults=(1, True)) paddle.fluid.layers.open_files ArgSpec(args=['filenames', 'shapes', 'lod_levels', 'dtypes', 'thread_num', 'buffer_size', 'pass_num', 'is_test'], varargs=None, keywords=None, defaults=(None, None, 1, None)) diff --git a/paddle/fluid/operators/sequence_mask_op.h b/paddle/fluid/operators/sequence_mask_op.h index 237857b51..0dd554adf 100644 --- a/paddle/fluid/operators/sequence_mask_op.h +++ b/paddle/fluid/operators/sequence_mask_op.h @@ -14,6 +14,14 @@ #pragma once +#ifdef __NVCC__ +#include +#include +#include +#else +#include +#endif + #include "paddle/fluid/framework/op_registry.h" #include "paddle/fluid/platform/for_range.h" @@ -26,50 +34,60 @@ class SequenceMaskOp : public framework::OperatorWithKernel { void InferShape(framework::InferShapeContext *ctx) const override { PADDLE_ENFORCE(ctx->HasInput("X"), "Input(X) must exist"); - auto max_len = ctx->Attrs().Get("max_len"); - PADDLE_ENFORCE_GT(max_len, 1, "Attr(max_len) must be larger than 1"); PADDLE_ENFORCE(ctx->HasOutput("Y"), "Output(Y) must exist"); - auto dim = framework::vectorize2int(ctx->GetInputDim("X")); - dim.push_back(max_len); - ctx->SetOutputDim("Y", framework::make_ddim(dim)); + + auto maxlen = ctx->Attrs().Get("maxlen"); + if (maxlen > 0) { // We can only infershape when maxlen > 0 + auto dim = framework::vectorize2int(ctx->GetInputDim("X")); + dim.push_back(maxlen); + ctx->SetOutputDim("Y", framework::make_ddim(dim)); + } } }; class SequenceMaskOpMaker : public framework::OpProtoAndCheckerMaker { public: void Make() override { - AddInput("X", "The input of sequence_mask op."); + AddInput("X", "The input tensor of sequence_mask op."); AddOutput("Y", "The output mask of sequence_mask op."); - AddAttr("max_len", "The maximum length of the sequence.") - .GreaterThan(1); + AddAttr("maxlen", + "The maximum length of the sequence. If maxlen < 0, maxlen " + "= max(Input(X)).") + .SetDefault(-1) + .AddCustomChecker([](int &v) { + PADDLE_ENFORCE(v < 0 || v >= 1, + "Attr(maxlen) must be less than 0 or larger than 1"); + }); AddAttr("out_dtype", "Output data type"); AddComment(R"DOC( SequenceMask Operator -This operator outputs a Mask according to Input(X) and Attr(max_len). +This operator outputs a Mask according to Input(X) and Attr(maxlen). Supposing Input(X) is a Tensor with shape [d_1, d_2, ..., d_n], the -Output(Y) is a mask with shape [d_1, d_2, ..., d_n, max_len], where: +Output(Y) is a mask with shape [d_1, d_2, ..., d_n, maxlen], where: Y(i_1, i_2, ..., i_n, j) = (j < X(i_1, i_2, ..., i_n)) + +If maxlen < 0, maxlen = max(X) )DOC"); } }; template struct SequenceMaskForRangeFunctor { - HOSTDEVICE SequenceMaskForRangeFunctor(const Tx *x, Ty *y, int max_len) - : x_(x), y_(y), max_len_(max_len) {} + HOSTDEVICE SequenceMaskForRangeFunctor(const Tx *x, Ty *y, int maxlen) + : x_(x), y_(y), maxlen_(maxlen) {} HOSTDEVICE void operator()(int y_idx) const { - int x_idx = y_idx / max_len_; - int j = y_idx % max_len_; + int x_idx = y_idx / maxlen_; + int j = y_idx % maxlen_; y_[y_idx] = static_cast(j < x_[x_idx] ? 1 : 0); } private: const Tx *x_; Ty *y_; - int max_len_; + int maxlen_; }; template @@ -77,14 +95,14 @@ struct SequenceMaskFunctor { using Tensor = framework::LoDTensor; SequenceMaskFunctor(const DeviceContext &ctx, const Tx *x, Tensor *y, - int limits, int max_len) - : ctx_(ctx), x_(x), y_(y), limits_(limits), max_len_(max_len) {} + int limits, int maxlen) + : ctx_(ctx), x_(x), y_(y), limits_(limits), maxlen_(maxlen) {} template void operator()() const { auto *y_data = y_->mutable_data(ctx_.GetPlace()); platform::ForRange for_range(ctx_, limits_); - for_range(SequenceMaskForRangeFunctor(x_, y_data, max_len_)); + for_range(SequenceMaskForRangeFunctor(x_, y_data, maxlen_)); } private: @@ -92,7 +110,7 @@ struct SequenceMaskFunctor { const Tx *x_; Tensor *y_; int limits_; - int max_len_; + int maxlen_; }; template @@ -103,13 +121,32 @@ class SequenceMaskKernel : public framework::OpKernel { void Compute(const framework::ExecutionContext &ctx) const override { auto *x = ctx.Input("X"); auto *y = ctx.Output("Y"); - auto max_len = ctx.Attr("max_len"); + auto maxlen = ctx.Attr("maxlen"); + + auto *x_data = x->data(); + auto x_numel = x->numel(); + if (maxlen < 0) { +#ifdef __NVCC__ + VLOG(10) + << "SequenceMaskOp on GPU may be slow when maxlen is not provided."; + maxlen = static_cast( + thrust::reduce(thrust::device_pointer_cast(x_data), + thrust::device_pointer_cast(x_data) + x_numel, + static_cast(0), thrust::maximum())); +#else + maxlen = static_cast(*std::max_element(x_data, x_data + x_numel)); +#endif + auto y_dim = framework::vectorize2int(x->dims()); + y_dim.push_back(maxlen); + y->Resize(framework::make_ddim(y_dim)); + } + auto out_dtype = static_cast( ctx.Attr("out_dtype")); auto &dev_ctx = ctx.template device_context(); - framework::VisitDataType(out_dtype, SequenceMaskFunctor( - dev_ctx, x->data(), y, - x->numel() * max_len, max_len)); + framework::VisitDataType(out_dtype, + SequenceMaskFunctor( + dev_ctx, x_data, y, x_numel * maxlen, maxlen)); } }; diff --git a/python/paddle/fluid/layers/nn.py b/python/paddle/fluid/layers/nn.py index 1fe457452..211f828d6 100644 --- a/python/paddle/fluid/layers/nn.py +++ b/python/paddle/fluid/layers/nn.py @@ -5525,13 +5525,46 @@ def flatten(x, axis=1, name=None): return out -def sequence_mask(x, max_len, mask_dtype='int64'): +def sequence_mask(x, maxlen=None, dtype='int64', name=None): + """ + **SequenceMask Layer** + + This layer outputs a mask according to the input :code:`x` and + :code:`maxlen` with data type of :code:`dtype`. + + Supposing :code:`x` is a Tensor with shape [d_1, d_2, ..., d_n], the + :code:`y` is a mask with shape [d_1, d_2, ..., d_n, maxlen], where: + + .. math:: + + y(i_1, i_2,..., i_n, j) = (j < x(i_1, i_2,..., i_n)) + + Args: + x (Variable): Input tensor of sequence_mask layer, + whose elements are integers less than :code:`maxlen`. + maxlen (int|None): Maximum length of the sequence. If :code:`maxlen` + is None, it would be replace with :math:`max(x)`. + dtype (np.dtype|core.VarDesc.VarType|str): Data type of the output. + name (str|None): A name for this layer(optional). If set None, the + layer will be named automatically. + + Returns: + Variable: The output sequence mask. + + """ + helper = LayerHelper('sequence_mask', **locals()) - y = helper.create_tmp_variable(dtype=mask_dtype) + if name is None: + out = helper.create_tmp_variable(dtype=dtype) + else: + out = helper.create_tmp_variable(dtype=dtype, name=name) + helper.append_op( type='sequence_mask', inputs={'X': [x]}, - outputs={'Y': y}, - attrs={'max_len': max_len, - 'out_dtype': y.dtype}) - return y + outputs={'Y': out}, + attrs={ + 'max_len': maxlen if maxlen is not None else -1, + 'out_dtype': out.dtype + }) + return out diff --git a/python/paddle/fluid/tests/unittests/test_sequence_mask.py b/python/paddle/fluid/tests/unittests/test_sequence_mask.py index c6d09df98..02c5b2040 100644 --- a/python/paddle/fluid/tests/unittests/test_sequence_mask.py +++ b/python/paddle/fluid/tests/unittests/test_sequence_mask.py @@ -13,7 +13,9 @@ # limitations under the License. from op_test import OpTest +import paddle.fluid as fluid from paddle.fluid.framework import convert_np_dtype_to_dtype_ +import paddle.fluid.core as core import numpy as np import copy import unittest @@ -22,7 +24,7 @@ import unittest class SequenceMaskTestBase(OpTest): def initDefaultParameters(self): self.op_type = 'sequence_mask' - self.max_len = 10 + self.maxlen = 10 self.mask_dtype = 'int64' self.x = [[0, 3, 4], [5, 7, 9]] @@ -38,15 +40,16 @@ class SequenceMaskTestBase(OpTest): self.inputs = {'X': self.x} self.outputs = {'Y': self.calc_ground_truth_mask()} self.attrs = { - 'max_len': self.max_len, + 'maxlen': self.maxlen, 'out_dtype': convert_np_dtype_to_dtype_(self.mask_dtype) } def calc_ground_truth_mask(self): - shape = self.x.shape + (self.max_len, ) + maxlen = np.max(self.x) if self.maxlen < 0 else self.maxlen + shape = self.x.shape + (maxlen, ) index_broadcast = np.broadcast_to( np.reshape( - range(self.max_len), newshape=[1] * self.x.ndim + [-1]), + range(maxlen), newshape=[1] * self.x.ndim + [-1]), shape=shape) x_broadcast = np.broadcast_to( np.reshape( @@ -82,5 +85,10 @@ class SequenceMaskTest5(SequenceMaskTestBase): self.mask_dtype = 'float64' +class SequenceMaskTest6(SequenceMaskTestBase): + def initParameters(self): + self.maxlen = -1 + + if __name__ == '__main__': unittest.main() -- GitLab